Malicious PDF — malware analysis report

Static analysis result for SHA-256 9989d5f599098b5d…

MALICIOUS

PDF

73.0 KB Created: 2021-03-20 16:19:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: ec0b70736d3ecaa8c1908639ab6f7589 SHA-1: a32e0f7cbbf2a38a48a275889f7bee49999a5e6b SHA-256: 9989d5f599098b5d8ede36e8882f342e8f698949b3e324a33b9c86b6b08f08db
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with at least one pointing to a disposable hosting domain, suggesting a link farm or phishing lure. The document body, though heavily obfuscated, contains text related to a 'Bosch fridge manual', likely a pretext to drive users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://jumiwimov.ru/wix?keyword=bosch+fridge+manual PDF link annotation
    • http://gemubanabugawa.mypressonline.com/muboleturisezin.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427097/normal_60167099c413c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471256/normal_600146acb1cf6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454290/normal_5fe13a67685f4.pdfIn PDF document text
    • https://jikeberu.weebly.com/uploads/1/3/1/8/131857846/wojaje.pdfIn PDF document text
    • https://nabisafuv.weebly.com/uploads/1/3/1/4/131413222/6f870e6f0e.pdfIn PDF document text
    • http://suwadebizon.mywebcommunity.org/rugiwoso.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372076/normal_604165846f7a5.pdfIn PDF document text
    • http://nigodofifulo.scienceontheweb.net/52086204523.pdfIn PDF document text
    • https://danivuzi.weebly.com/uploads/1/3/2/6/132681213/jakejuterakis_renuturid_pupagaxizoti_vavoxuruzidov.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://a22c3535-4c29-4f26-bf6b-1e631d3648e5.filesusr.com/ugd/28986c_eb9c7159472741ffa9cf767cd5a32c26.pdf?index=trueIn PDF document text
    • http://sifebitufol.onlinewebshop.net/54936607408.pdfIn PDF document text
    • http://jabenesejamuji.rf.gd/vukeraditinakabu.pdfIn PDF document text
    • https://7162f0c1-3bb2-4775-9ad2-1e34613fb889.filesusr.com/ugd/595093_22c8d979685d42dd9b817bd55cbaefa2.pdf?index=trueIn PDF document text
    • http://rixibedi.onlinewebshop.net/herbaceous_plants.pdfIn PDF document text
    • http://nubuxaza.rf.gd/professional_email_signature_templates_for_outlook.pdfIn PDF document text
    • https://3eeb541e-75be-486c-a732-b1e279b2a932.filesusr.com/ugd/eaab1c_a85c4a0cadd04c6ba270d5cc6316d06e.pdf?index=trueIn PDF document text
    • https://ac09d6fb-20d1-47e2-97cb-2568fc137cdf.filesusr.com/ugd/03dcd4_2b3214dfd8064cdea2a4703cf0bf8d08.pdf?index=trueIn PDF document text
    • http://sumabaxesopev.rf.gd/methyl_orange_dye.pdfIn PDF document text
    • https://247e77cc-5367-4382-8586-7c5891409f42.filesusr.com/ugd/2dbf5a_3e11f4dfecb042e785f12f306f926dcd.pdf?index=trueIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d3b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3B0 5288 bytes
SHA-256: eb93389299c7b80d57a2e8fd5d73851cb2695027c3646f606485a9197f228156
font_01_sfnt_off0000e575.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE575 10240 bytes
SHA-256: 08395e80ff76854a7dfa461b16e6b0547fdf4ed522165e634b0b69a5f34eb055
font_02_sfnt_off000108ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108AC 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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